Explain: In a physical change, like changing state from a solid to a liquid, the substance itself doesn’t really change. In a chemical change, new substances are created from the old substances. Are the atoms and mass that make up these new substances created, destroyed, or rearranged? In a chemical reaction atoms and mass are…

Newtons second law deals most cosely with

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas